Staffers of the U.S. Agency for International Development were instructed to stay out of the agency’s Washington headquarters on Monday, according to a notice distributed to them, after billionaire Elon Musk announced President Donald Trump had agreed with him to shut the agency.

Amid ongoing turmoil inside the U.S. Agency for International Development, sources say that Department of Government Efficiency staffers have moved to take over offices.

Elon Musk called USAID a criminal organization that should “die.” Proponents say it’s a key arm of U.S. influence that, if destroyed, “cannot be easily rebuilt.”